New site of temporary storage of rRNA in O. mykiss previtellogenic oocytes

This article describes a new organelle found in the cytoplasm of the growth stage fish oocytes. In particular, we describe its organization at the morphological level and investigate its composition by different cytochemical and immunocytochemical approaches with both light and electron microscope....

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Bibliographic Details
Published in:Molecular reproduction and development 2000-06, Vol.56 (2), p.198-206
Main Authors: Fusco, S., Filosa, S., Iacoviello, M., Indolfi, P., Tammaro, S., Motta, C.M.
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Cell differentiation, maturation, development, hematopoiesis
Cell physiology
Female
Fundamental and applied biological sciences. Psychology
Molecular and cellular biology
Oncorhynchus mykiss
oocytes
Oocytes - growth & development
Oocytes - metabolism
Oocytes - ultrastructure
RNA, Ribosomal - metabolism
rRNA
storage
trout
Vitellogenesis - physiology
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Summary:This article describes a new organelle found in the cytoplasm of the growth stage fish oocytes. In particular, we describe its organization at the morphological level and investigate its composition by different cytochemical and immunocytochemical approaches with both light and electron microscope. The conclusion is that the body is a peculiar protein scaffold functioning as a temporary trap for the storage of rRNA in the mid to late growth stage oocytes. Its presence would be related to the reorganization of the mass of amplified rDNA in micronucleoli and to the consequent temporary stop in the rRNA synthesis. Mol. Reprod. Dev. 56:198–206, 2000. © 2000 Wiley‐Liss, Inc.
ISSN:1040-452X
1098-2795
DOI:10.1002/(SICI)1098-2795(200006)56:2<198::AID-MRD11>3.0.CO;2-H